Remove ixmp as optional dependency #688
Merged
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Description of PR
This PR removes the ixmp packages as an optional dependency. The feature to read IAMC-style scenario data directly from an ixmp database instance was untested, does not support meta-indicators and, as far as I know, is not used by anyone.
The feature to query data from an IIASA Scenario Explorer database (
pyam.read_iiasa()
) is not affected by this PR!The PR prepares for the release of ixmp 4.0.0, based on a discussion with @meksor and @phackstock today.
@gidden @OFR-IIASA @behnam-zakeri @byersiiasa, please shout if you are using this feature or know of anyone who does...